Carry out tool (9)
I believe the answer is:
implement
This clue is a double definition.
'carry out' is the first definition.
(I know that carry out can be written as implement)
'tool' is the second definition.
(implement can mean a tool or utensil)
(Other definitions for implement that I've seen before include "Put into effect; tool" , "Perform" , "Complete" , "Put into operation" , "appliance" .)